JPH07168997A - On-vehicle navigator - Google Patents

Abstract

PURPOSE:To easily obtain road traffic information by characters and a simple map. CONSTITUTION:Based on the location of a car detected by a GPS receiver 4, a map plotting part 10d plots the map image surrounding the location of the car with the mark of the location of the car on a video RAM 10c by using the map data of CD-ROM 3. After the image is converted into a prescribed video signal in a conversion part 10a, a screen display is performed for the image on a display device 6. In parallel to this, VICS data of various kinds of levels which is transmitted from a VICS correspondence station is received by a tuner 2 for FM multiplex broadcasting and is temporarily stored in a buffer memory 10a. A retrieval part 10a retrieves whether VICS data of a level 1 or 2 for the link in the periphery of the location of the car is received or not, referring to map data and a buffer memory 10a. When the data is received, a road traffic information guide part 10f plots the road traffic information image based on the VICS data on the part of a video RAM 10c and displays the image on the part of a map image screen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted navigation device, and more particularly to a vehicle-mounted navigation device capable of providing a user with road traffic information based on VICS data received from FM multiplex broadcasting.

[0002]

2. Description of the Related Art The present location of a vehicle is detected by self-contained navigation or satellite navigation, map data around the present location is read out from map data storage means such as a CD-ROM, an IC memory card, etc., and a map image is displayed on the screen together with a vehicle position mark. There is a vehicle-mounted navigation device that provides a driver with map information around the vehicle position by displaying the map information. According to this device, even when traveling on the first route, it is possible to easily determine where the current position is and which route can be selected to reach the desired position.

By the way, only by displaying a map image on the screen based on the map data, it is not possible to know the occurrence of traffic congestion or traffic regulation, and it is not possible to take an appropriate detour route in advance. Therefore, by providing the vehicle with various information such as the current location, destination information, parking lot information, traffic congestion, cautions / regulations, and required time by wireless communication such as quasi-microwave beacon and FM multiplex broadcasting, the driver can obtain various information. Road traffic information and communication system (VICS) is being developed and put into practical use, which makes it possible to quickly travel to a desired place on a proper route while making comprehensive judgment on information. Among them, in the FM multiplex broadcasting, road traffic information such as relatively wide area congestion, cautions / regulations, required time, etc. is provided for each of levels 1, 2, and 3. Level 3 searches VICS data received from FM multiplex broadcasting for data on links included in the currently displayed map image, and overlays a traffic jam figure, a traffic control mark, etc. on the corresponding part on the map image. To draw. Level 1 displays the congestion point and its reason, congestion length, congestion / restriction point and its contents, required time, etc. with several lines of characters, and Level 2 uses a simple map to display the congestion point and length, Cautions / Regulations, contents, required time, etc. are displayed.

[0004]

However, in the conventional VICS-compatible in-vehicle navigation device, when the level 3 is designated on the operation panel, the VICS data regarding the link included in the map image on the screen is automatically searched. Road traffic information is drawn on the map image so that complicated operations are not required. However, at Level 1 and Level 2, congestion on the operation panel, content types such as cautions / regulations, regions, highways, and national roads. If you do not select the desired program by specifying the road type such as, you cannot know whether there is traffic congestion or cautions / regulations about links near your current location. -Even when trying to know the contents of regulations, there was a problem that the level 1 and level 2 call operation of road traffic information was troublesome. From the above, an object of the present invention is to provide a vehicle-mounted navigation device that can easily obtain road traffic information by characters or a simple map.

[0005]

According to the present invention, there is provided an FM multiplex broadcast receiving means for receiving and demodulating various levels of VICS data relating to road traffic information from an FM multiplex broadcast, and a temporary storage for storing VICS data. Storage means,
Map data storage means for storing map data, vehicle position detection means for detecting the vehicle position, map drawing means for displaying a map image around the vehicle position together with vehicle position marks on the screen of the display means, map data and temporary storage Referring to the means, a search means for searching whether or not level 1 or 2 VICS data is received for a link around the vehicle position, and when the search means finds the level 1 or 2 VICS data, the VICS This is achieved by providing road traffic information guide means for displaying road traffic information based on data on a part of the screen of the display means or for voice synthesis output.

[0006]

According to the present invention, the vehicle position is detected, a map image around the vehicle position is drawn together with the vehicle position mark using the map data, and the image is displayed on the screen. VICS data of various levels related to road traffic information is received, demodulated and temporarily stored. Then, referring to the map data and the temporary storage means, it is searched whether the VICS data of level 1 or 2 is received for the links around the vehicle position, and when it is received, the road traffic information based on the VICS data is displayed. It is displayed on a part of the screen of the means or output by voice synthesis. As a result, it is possible to easily obtain the level 1 or level 2 road traffic information about the links around the vehicle position, and it is possible to promptly take an appropriate response according to the road conditions.

Also, the VICS of level 3 around the vehicle position
If the data is received, it is also searched, and when it is received, the graphic / symbol indicating the road traffic information is overlaid and drawn on the map image using the VICS data. Thereby, the level 1 or 2 around the vehicle position and the level 3 road traffic information can be obtained together.

Further, the vehicle position is detected, a map image around the vehicle position is drawn together with the vehicle position mark using the map data, and is displayed on the screen. In parallel with this, from the FM multiplex broadcast to the road traffic information. The various levels of VICS data are received, demodulated, and temporarily stored. Then, referring to the map data and the temporary storage means, it is searched whether or not the level 1 or 2 VICS data has been received for the links around the vehicle position, and when the level 1 or 2 VICS data has been received, according to the user's request, based on the VICS data. The road traffic information is switched and displayed on the screen of the display means. Also by this, it is possible to easily obtain the level 1 or 2 road traffic information about the links around the vehicle position, and it is possible to promptly take an appropriate response according to the road condition. At this time, it is also searched whether the level 3 VICS data around the vehicle position is received, and the level 3 is displayed while the map image is displayed on the screen.
When the VICS data is found, the graphics / symbols indicating the road traffic information are overlaid and drawn on the map image using the VICS data, so that the level 1 or 2 around the vehicle position and the level 3 road are displayed. You will be able to easily get traffic information.

Further, referring to the map data and the temporary storage means, it is searched whether or not the VICS data is received for the link currently on the vehicle or a link which is an extension of the link, and the corresponding VICS data is found. When issued, the road traffic information including the positional relationship with the vehicle position is displayed on a part of the screen of the display means or is voice-synthesized and output based on the VICS data. As a result, traffic jams, traffic restrictions, etc. existing in front of the route on which the vehicle is traveling can be quickly known, and an appropriate response can be swiftly taken according to the road conditions.

Further, referring to the map data and the temporary storage means, it is searched whether or not the level 1 or 2 VICS data exists for the link included in the map image on the screen, and the corresponding VICS data is found. At this time, the corresponding link on the map image on the screen is highlighted, and when the user requests road traffic information, the road traffic information based on the VICS data found by the search means is displayed on the screen of the display means, or Output voice synthesis. With this, it is possible to determine at a glance whether or not there is road traffic information of Levels 1 and 2 related to links around the vehicle position, and Level 1 around the vehicle position
Alternatively, the road traffic information of item 2 can be obtained quickly.

Further, it is searched whether or not the level-1 or level-2 VICS data for each information content designated by the user exists, and when the corresponding VICS data is found, the corresponding link on the map on the screen is highlighted. . As a result, it is possible to know whether or not there is level 1 or 2 road traffic information around the vehicle position according to the information content such as traffic congestion, traffic restrictions, and the like.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall configuration diagram of a VICS compatible vehicle-mounted navigation device according to a first embodiment of the present invention. 1
Is an antenna, 2 is an FM multiplex broadcasting tuner which receives FM multiplex broadcasting and outputs a stereo audio signal, and which receives and demodulates VICS data as FM multiplex data, 3 is a CD-ROM storing map data, 4 is a GPS receiver for detecting the vehicle position and vehicle direction by satellite navigation, and 5 is an operation panel, which is a tuning operation key for an FM multiplex broadcasting tuner, a navigation mode / road traffic information program mode switching key, road traffic information , A program selection key for selecting a desired program, and a first special display for synthesizing or stopping the level 1 and level 2 road traffic information around the vehicle position in the navigation mode in a part of the map image screen. Mode on / off key, level 1 around the vehicle position
A second special display mode on / off key for displaying or stopping the level 2 road traffic information on the entire screen is provided. Reference numeral 6 is a display device for displaying a vehicle position mark, a level 3 road traffic information graphic, and a symbol on a map image, and for displaying a level 1 and level 2 road traffic information image on a part or all of the screen. is there.

Reference numeral 10 denotes a navigation controller, which inputs each data of the vehicle position and the vehicle direction detected by the GPS receiver 4 in the navigation mode, and the CD-R.
A map image around the vehicle position is drawn using the map data stored in the OM3, a vehicle position mark is superimposed on the map image, and the vehicle position is included in the VICS data received and demodulated by the FM multiplex broadcasting tuner 2. Using the data related to level 3 regarding the surrounding links, a graphic indicating a traffic jam location, a symbol indicating a caution / restriction location, etc. are overlaid and drawn on the map image and displayed on the display device 6. When the first special display mode is turned on, of the VICS data received and demodulated by the FM multiplex broadcast tuner 2, data relating to levels 1 and 2 for links around the vehicle position is used to display the map image screen. A level 1 character image is displayed at the top and a level 2 simple map image is reduced and displayed at the bottom left, and voice synthesis output based on the level 1 character data is performed. When the second special display mode is turned on, the screen is switched, the level 1 character image is displayed at the upper part of the screen, and the level 2 simple map image is displayed at the rest of the normal size, and voice synthesis is performed based on the level 1 character data. Output. In addition, when the navigation mode is switched to the road traffic information program mode, the road traffic information image related to the program selected by the program selection operation is displayed on the screen.

Reference numeral 10a is a buffer memory for temporarily storing VICS data received and demodulated by the FM multiplex broadcasting tuner 10, 10b is a buffer memory for temporarily storing map data read from the CD-ROM 3, and 10c is a map image. Video RAM for storing road traffic information images 10
Reference numeral d denotes a map drawing unit, which inputs vehicle position data and vehicle direction data from the GPS receiver 4 and reads map data around the vehicle position from the CD-ROM 3 to the buffer memory 10b, using the read map data. A map image centering on the vehicle position is drawn in a video RAM described later with north facing upward, and a vehicle position mark whose vehicle azimuth direction is oriented at the center of the map image.

When 10e is in the navigation mode, a link around the vehicle position (drawn in the video RAM) is drawn from the map data stored in the buffer memory 10b, the VICS data stored in the buffer memory 10a, and the vehicle position data. A link within the range of the specified map image), and a search unit that searches for and outputs VICS data of levels 1, 2, and 3 for the specified link. The next mesh code and the reference link number are used to check which link in the map data the VICS data corresponds to. In the road traffic information program mode, the search unit 10e searches for and outputs VICS data related to a program desired by the user according to the program selection operation.

Reference numeral 10f denotes a road traffic information guide section, which is the level 3 VICS searched by the search section 10e when the second special display mode is off in the navigation mode.
Based on the data, a graphic indicating traffic jam or a symbol indicating caution / restriction is overlaid and drawn on a corresponding portion of the map image of the video RAM 10c. Also, the first under navigation mode
When the special display mode is turned on, the level 1 character image is displayed on the upper portion of the video RAM 10c by using the VICS data relating to the levels 1 and 2 for the links around the vehicle position.
When a simple map image of level 2 is reduced and drawn in the lower left and the second special display mode is turned on, VICS data concerning levels 1 and 2 for links around the vehicle position is used,
Instead of the map image of the video RAM 10c, a character image of level 1 is drawn on the upper part, and a simple map image of level 2 is drawn on the remaining area in a normal size. Level 1 and Level 2 VICS searched by the search unit in the first and second special display modes
When there are multiple data, it is drawn by switching at regular intervals. Also, in the road traffic information program mode, the video RAM 10c displays the road traffic information image relating to the program desired by the user.
Draw on.

The road traffic information guide unit 10f has a voice synthesizing circuit (not shown) built therein, and is searched by the search unit 10e when the first special display mode or the second special display mode is on. Based on the level 1 VICS data (character data), a voice synthesized road traffic information voice signal is output. Reference numeral 10g is a conversion unit for reading an image drawn in the video RAM 10c and converting it into a video signal of a predetermined system and outputting it to the display device 6, 7 is an amplifier for amplifying road traffic information audio signals, and 8 is a speaker for acoustically converting the output of the amplifier. Is.

2 to 6 are flow charts showing the operation of the navigation controller according to the first embodiment, and FIG. 7 is an explanatory view of a screen display example, which will be described below with reference to these drawings. When the power is turned on, the FM multiplex broadcasting tuner 2 tunes to the desired station, outputs the stereo audio signal received from the desired station, and the current receiving station is an FM multiplex broadcasting station compatible with the VICS system. , VICS data is also received and demodulated and output to the navigation controller 10. The navigation controller 10 temporarily stores the VICS data in the buffer memory 10a by the interrupt processing (step 501 in FIG. 6). Further, when the power is turned on, the GPS receiver 4 periodically detects the vehicle position and the vehicle direction by satellite navigation, and outputs the vehicle position data and the vehicle direction data.

After the power is turned on, the navigation controller 10 enters the navigation mode (both the first special display mode and the second special display mode are off), and inputs the vehicle position data and the vehicle azimuth data from the GPS receiver 4 (see FIG. 2). Steps 101, 102). And the map drawing unit 1
0d reads the map data around the vehicle position from the CD-ROM 3 to the buffer memory 10b, and uses the read map data to draw a north-facing map image on the video RAM 10c for one screen centering on the vehicle position. (Step 103). Next, the search unit 10e causes the buffer memory 10
The links around the vehicle position are specified using the map data and the vehicle position stored in b (step 104), and the levels 1 and 2 for each specified link are specified in the VICS data stored in the buffer memory 10a. , 3 are searched for the existence of data at each level, and if they are present, they are output to the road traffic information guide unit 10f for each level and each link (step 105).

The road traffic information guide section 10f is the search section 10
When the VICS data related to level 3 around the vehicle position is found in e, the video RAM 10c is found based on the data.
A graphic indicating a traffic jam location, a symbol indicating a caution / restriction location, and the like are drawn on the map image of (step 106). Next, the map drawing unit 10d draws a vehicle position mark in which the vehicle azimuth direction is directed to the center of the map image of the video RAM 10e based on the vehicle azimuth data (step 107). The image drawn in the video RAM 10c is read by the conversion unit 10g, converted into a video signal of a predetermined system, output to the display device 6, and displayed on the screen (steps 108 and 109, see FIG. 7 (1)). after this,
The navigation controller 10 checks whether or not a key operation has been performed on the operation panel 5 (step 110, steps 201 and 202 in FIG. 3), and if there is no particular operation, again returns to FIG.
Returning to step 102, the next vehicle position data and vehicle azimuth data are input from the GPS receiver 4, and the same processing is repeated.

When the user wants to know the cause of the congestion area on the screen, he presses the first special display mode ON key. Then, the navigation controller 10 enters the first special display mode (steps 110 and 111 in FIG. 2), and at this time, the road traffic information guide unit 10f advances the search unit 10 in advance.
When the level 1 VICS data relating to the link around the vehicle position is searched for in e, the link on which the vehicle position is located and the direct connection relationship with the link are based on the level 1 VICS data input from the search unit 10e. Depending on the priority of a certain link or another link, if there is VICS data of level 1 for the link on which the vehicle position is located, the video RAM 10 is based on that data.
Road traffic information in text is drawn on the upper part of the map image of c, and in conjunction with this, a road traffic information voice signal is generated by voice synthesis and output to the amplifier 7 (step 10).
8, step 301, 302 in FIG. 4).

When the search unit 10e is searching for Level 2 VICS data relating to links around the vehicle position, the Level 2 VICS input from the search unit 10e is searched.
Based on the ICS data, the link where the vehicle position is,
According to the priorities of the link having a direct connection relationship with the link and the other links, first, if VICS data of level 2 exists for the link on which the vehicle position is located, it is drawn in the video RAM 10c based on the data. A simple map image is compressed and drawn at the lower left of the map image (step 3
03). The image drawn in the video RAM 10c is read by the conversion unit 10g, converted into a video signal of a predetermined system, output to the display device 6, and displayed on the screen (step 304, see FIG. 7 (2)). Also,
Road traffic information of character contents of level 1 flows from the speaker 8. This makes it possible to know the location of traffic jams and road closures on the map image, as well as detailed road traffic information such as causes of traffic congestion, cautions / regulations, etc., using characters, simple maps, and voice synthesis output. Therefore, appropriate measures such as selecting a detour and estimating the time required to reach a desired place can be taken promptly.

After step 304, the navigation controller 10 checks whether the first special display mode off key has been pressed on the operation panel 5 (step 305), and NO.
If so, the process returns to step 102 of FIG. 2 and the same processing is repeated. At this time, the contents of the level 1 road traffic information image and the road traffic information voice output, the contents of the level 2 road traffic information image at the lower left of the screen are used for the link where the vehicle position is on, the link which is in direct connection with the link, etc. The link priority will be changed automatically at regular intervals. after this,
When the first special display mode off key is pressed, the level 1 character display and voice synthesis output at the top of the screen and the simple map image display at the bottom left of the screen disappear (step 305 in FIG. 4, FIG. 2).
Step 101).

On the other hand, when the second special display mode ON key is pressed, the navigation controller 10 enters the second special display mode (step 201 in FIG. 3, step 401 in FIG. 5), and at this time, the road traffic information guide section. Reference numeral 10f denotes the level 1 VI input from the search portion 10e when the search portion 10e has previously searched for the level 1 VICS data regarding the links around the vehicle position.
Based on the CS data, the video RAM 10c is switched while switching at regular time intervals in the order of the link on which the vehicle position is located, the link directly connected to the link, and another link.
The road traffic information in text is drawn on the upper part of, and in conjunction with this, a road traffic information voice signal representing the contents of the road traffic information image currently drawn for level 1 is generated and output to the amplifier 7 (step 402). , 403).

When the search unit 10e is searching for Level 2 VICS data relating to links around the vehicle position, the Level 2 VICS input from the search unit 10e is searched.
Based on the ICS data, the link where the vehicle position is,
The video RAM 10c is switched in order of a link having a direct connection with the link and another link at regular intervals.
The simple map image is drawn in the normal size in the remaining area (step 404). The image drawn in the video RAM 10c is read by the conversion unit 10g, converted into a video signal of a predetermined system, output to the display device 6, and displayed on the screen (step 405, see FIG. 7 (3)). Further, the road traffic information having the character content of level 1 flows from the speaker 8. With this, letters and simple maps,
By voice synthesis output, you can know traffic congestion information, caution / regulation information, etc. depending on Levels 1 and 2 around the vehicle position.
Since the simple map is displayed in a large size, road traffic information according to level 2 can be easily viewed.

After step 405, the navigation controller 10 checks whether the second special display mode off key has been pressed on the operation panel 5 (step 406), and NO.
If so, the process proceeds to step 407, the next vehicle position data and vehicle azimuth data are input from the GPS receiver 4, and the search unit 10e identifies a link around the vehicle position (step 4
08), level 1 for each specified link in the VICS data stored in the buffer memory 10a.
It is searched whether or not the data of each level of 2 and 3 exist, and when it exists, the data is output to the road traffic information guide unit 10f for each level and for each link (step 409). Then, returning to step 402, the same processing is repeated. As a result, the contents of the level 1 road traffic information image and the road traffic information voice output at the top of the screen, and the contents of the level 2 road traffic information image of the rest of the screen are automatically changed at regular intervals.

After that, when the second special display mode off key is pressed, the display state of the map image in the original navigation mode is restored (step 406, step 1 in FIG. 2).
01). When the road traffic information program key is pressed, the navigation controller 10 enters the road traffic information program mode (steps 202 and 203 in FIG. 3), and the operation panel 5
When the user performs a program selection operation at, the retrieval unit 10e retrieves the corresponding VICS data from the buffer memory 10a and outputs it to the road traffic information guide unit 10f, and the road traffic information guide unit 10f inputs the input VICS data. Video RA for road traffic information images related to user-desired programs based on
Drawing is performed on M10c (steps 204 and 205). The image drawn in the video RAM 10c is read out by the conversion unit 10g and converted into a video signal of a predetermined system, and is output to the display device 6 to be displayed on the screen, so that the user can see the road traffic information image. (Step 206).

According to this embodiment, if the mode is switched to the first special display mode in advance, it is possible to switch to the level 3 without manually searching for the level 1 and level 2 road traffic information programs around the vehicle position. In addition, detailed road traffic information about Levels 1 and 2 around the vehicle position can be automatically obtained together, and an appropriate response can be swiftly taken according to the road conditions. Further, by turning off the first special display mode, it is possible to display the map image together with the level 3 road traffic information on the entire screen. In this state, if the second special display mode is turned on only when necessary, one by one , Level 1 around the vehicle position can be easily performed without searching manually for level 1 and 2 road traffic information programs around the vehicle position.
It is possible to display the detailed road traffic information according to 2 and 2 in a large size on the entire screen. In addition, the first special display mode and the second
Immediately after the special display mode is turned on, the level 1 and 2 road traffic information related to the link on which the vehicle is carried out is preferentially displayed and voice-synthesized and output, so that the link currently running is congested or closed. When you are there, you can immediately take appropriate measures such as detours.

In the above-mentioned embodiment, the search unit searches the links around the vehicle position for the presence of level 1 and level 2 VICS data, but specifies only the link on which the vehicle is on. V for the specified link
The ICS data is searched for in the buffer memory, and the searched VICS data is output to the road traffic information guide section. The road traffic information guide section outputs the level 1 and 2 road traffic only for the link on which the vehicle is on. An information image may be drawn or voice synthesis output may be performed. Also,
The road traffic information guide unit may display one of Level 1 and Level 2 designated by the user, and also displays information of the type designated by the user in terms of traffic congestion, cautions, restrictions, etc. You may do it. Furthermore, for level 1, only display the road traffic information image,
You may make it perform only a voice synthesis output. Further, in the navigation mode, the traffic congestion figure and the road traffic information of the caution / restriction symbol are automatically displayed in the level 3, but they may be displayed only when instructed by the user.

FIG. 8 shows a VICS according to a second embodiment of the present invention.
It is an overall configuration diagram of a corresponding in-vehicle navigation device,
The same components as those in FIG. 1 are designated by the same reference numerals. 5
Reference numeral 0 denotes an operation panel, which is a tuning operation key for the FM multiplex broadcasting tuner, a switching key between the navigation mode and the road traffic information program mode, a program selection key for selecting a desired program from the road traffic information, and a vehicle in the navigation mode. When there is road traffic information such as traffic jams, cautions, restrictions, etc. for the link on which the position is on or an extension of the link, a character indicating the distance from the vehicle position and the content is displayed on a part of the screen, In addition, a special display mode ON / OFF key for outputting or stopping the voice synthesis is provided.

Reference numeral 100 denotes a navigation controller which inputs each data of the vehicle position and the vehicle direction detected by the GPS receiver 4 in the navigation mode, and the CD-R.
A map image around the vehicle position is drawn using the map data stored in the OM3, a vehicle position mark is superimposed on the map image, and the vehicle position is included in the VICS data received and demodulated by the FM multiplex broadcasting tuner 2. Using the data related to level 3 regarding the surrounding links, a graphic indicating a traffic jam location, a symbol indicating a caution / restriction location, etc. are overlaid and drawn on the map image and displayed on the display device 6. FM multiplex broadcasting tuner 2 when the special display mode is turned on
In the level 3 VICS data received and demodulated by
When there is data regarding a link on which the vehicle position is located or a link on the extension of the link, a character indicating the distance from the vehicle position and the content is displayed on a part of the screen, and voice synthesis output is performed. In addition, when the navigation mode is switched to the road traffic information program mode, the road traffic information image related to the program selected by the program selection operation is displayed on the screen.

100e is map data stored in the buffer memory 10b when in the navigation mode,
From the VICS data stored in the buffer memory 10a and the vehicle position data, a link around the vehicle position (link within the range of the map image drawn in the video RAM) is specified, and the specified link is Search for the level 3 VICS data and output it.
At this time, among the links around the vehicle position, the VICS data of level 3 for the link on which the vehicle is on and the link on the extension in front of the vehicle traveling from the link are output separately from other links. In the road traffic information program mode, the search unit 100e searches for and outputs VICS data related to a program desired by the user according to the program selection operation.

100f is a road traffic information guide section,
When the special display mode is off in the navigation mode, the VICS of level 3 searched by the search unit 100e
Based on the data, a graphic indicating traffic jam or a symbol indicating caution / restriction is overlaid and drawn on a corresponding portion of the map image of the video RAM 10c. Further, when the special display mode is turned on under the navigation mode, when the level 3 VICS data of the link on which the vehicle position is on or the link on the extension of the link exists, the distance from the vehicle position and the contents Is displayed on the upper part of the video RAM 10c, and a road traffic information voice signal by voice synthesis is output. For example, as shown in FIG. 9, when traffic congestion occurs on the front link LK ₁ which is in a linear relationship with the link LK ₂ on which the vehicle is on, the VICS data of level 3 indicates that the content type is traffic congestion, and the link is a traffic congestion point. LK ₁
Since the start position S and the end position P of the traffic jam are given,
The distance L (km) from the vehicle position to the last position of the traffic jam is calculated, and the message "I will be in traffic congestion at Lkm in the future" is displayed and voice synthesis output is performed. The other components are configured similarly to FIG.

10 to 12 are flowcharts showing the operation of the navigation controller according to the second embodiment, and FIG. 13 is an explanatory view of a screen display example, which will be described below with reference to these drawings. When the power is turned on, the FM multiplex broadcasting tuner 2 tunes to the desired station, outputs the stereo audio signal received from the desired station, and the current receiving station is an FM multiplex broadcasting station compatible with the VICS system. Navigation controller 10 that also receives and demodulates VICS data
Output to 0. The navigation controller 100 causes the buffer memory 10a to temporarily store the VICS data by interrupt processing. Further, when the power is turned on, the GPS receiver 4 periodically detects the vehicle position and the vehicle direction by satellite navigation, and outputs the vehicle position data and the vehicle direction data.

After the power is turned on, the navigation controller 100 enters the navigation mode (special display mode off) and inputs the vehicle position data and the vehicle azimuth data from the GPS receiver 4 (steps 601 and 60 in FIG. 10).
2). Then, the map drawing unit 10d reads the map data around the vehicle position from the CD-ROM 3 into the buffer memory 10b, and uses the read map data to display a north-facing map image for one screen centered on the vehicle position. Video RA
Drawing on M10c (step 603). Next, the search unit 100e uses the map data and the vehicle position stored in the buffer memory 10b to identify a link around the vehicle position (step 604), and identifies the link in the VICS data stored in the buffer memory 10a. Searches for level data about the link you made, and if so,
Output to the road traffic information guide unit 10f (step 60)
5). At this time, among the links around the vehicle position, the VICS data of level 3 for the link on which the vehicle is mounted and the link on the straight extension from the link in the vehicle traveling direction are output separately from other links. To do.

The road traffic information guide unit 100f is the search unit 1
When VICS data related to level 3 around the vehicle position is found at 00e, the video RAM 1 is searched based on the data.
A figure indicating a congestion point, a mark indicating a caution / restriction point, etc. are drawn on the map image of 0c (step 606).
Next, the map drawing unit 10d, based on the vehicle direction data,
A vehicle position mark whose vehicle azimuth direction is oriented is drawn at the center of the map image in the video RAM 10e (step 607).
The image drawn in the video RAM 10c is read by the conversion unit 10g, converted into a video signal of a predetermined system, output to the display device 6, and displayed on the screen (step 608, step 701 of FIG. 11, FIG. 13).
(See (1)). After that, the navigation controller 100 checks whether or not a key operation has been performed on the operation panel 50 (steps 702 and 704), and if there is no particular operation, returns to step 602 of FIG. And vehicle direction data are input, and the same processing is repeated.

When the user wants to know whether there is a traffic jam or a roadblock ahead of the vehicle, he presses the special display mode ON key. Then, the navigation controller 100 enters the special display mode (steps 702 and 70 in FIG. 11).
3) At this time, the road traffic information guide unit 100f uses the search unit 100e in advance to set the level 3 for the link on which the vehicle position is located or the link existing on the extension in the forward direction of the vehicle as viewed from the link. When VICS data is being searched, based on the VICS data input from the search unit 100e, characters indicating the distance from the vehicle position and the content are displayed on the upper part of the video RAM 10c, and the road traffic information voice signal by voice synthesis is displayed. Is output to the amplifier 7 (steps 801 and 802 in FIG. 12).

The image drawn in the video RAM 10c is read by the conversion unit 10g, converted into a video signal of a predetermined system, output to the display device 6, and displayed on the screen (step 803, FIG. 13 (2)).
Further, the road traffic information having the character contents displayed on the upper part of the screen flows from the speaker 8. This makes it possible to know the location of traffic jams and traffic closures around the vehicle position on the map image, and the distance and contents of traffic jams and traffic closures ahead of the vehicle can be known from the text and voice synthesis output at the top of the screen. Therefore, it is possible to promptly take an appropriate response such as selecting a detour. After step 803, the navigation controller 100 checks whether the special display mode off key is pressed on the operation panel 50 (step 804), and if NO, returns to step 602 in FIG. 10 and repeats the same processing.

After that, when the special display mode off key is pressed, the character display and the voice synthesis output at the top of the screen disappear (step 804 in FIG. 11 and step 60 in FIG. 10).
1). When the road traffic information program key is pressed, the navigation controller 100 enters the road traffic information program mode (steps 704 and 705 in FIG. 11), and if the user performs a program selection operation on the operation panel 50, the search unit 100e.
Retrieves the corresponding VICS data from the buffer memory 10a and outputs it to the road traffic information guide unit 100f,
The road traffic information guide unit 100f draws a road traffic information image relating to the user-desired program on the video RAM 10c based on the input VICS data (steps 706, 70).
7). The image drawn in the video RAM 10c is the conversion unit 1
0g reads out and converts into a video signal of a predetermined system, outputs to the display device 6 and is displayed on the screen, so that the user can see the road traffic information image (step 708).

According to the second embodiment, when the special display mode is turned on, the positional relationship with the vehicle position is included in the link currently on the vehicle or the link which is an extension of the link based on the VICS data. By displaying the road traffic information on a part of the screen and synthesizing voice output, it is possible to quickly know the traffic jams, traffic restrictions, etc. existing in front of the route you are running, depending on the road condition. An accurate response can be taken promptly.

In the second embodiment described above, the road traffic information including the positional relationship with the vehicle position is displayed on the screen based on the VICS data of level 3 for the link on which the vehicle is on and the link on the extension of the link. Although it is displayed on a part of the screen and is subjected to the voice synthesis output, the display and the voice synthesis output may be performed based on the VICS data of another level. Further, the road traffic information including the positional relationship with the vehicle position may be provided only by screen display or only by voice synthesis output. Also, in the navigation mode,
Although the road traffic information such as the traffic jam figure and the caution / restriction symbol according to the level 3 is automatically displayed, it may be displayed only when instructed by the user.

FIG. 14 shows a VIC according to the third embodiment of the present invention.
FIG. 2 is an overall configuration diagram of an S-compatible vehicle-mounted navigation device, and the same components as those in FIG. 1 are denoted by the same reference numerals. An operation panel 51 is a tuning operation key for the FM multiplex broadcasting tuner, a navigation mode / road traffic information program mode switching key, a program selection key for selecting a desired program from among road traffic information, and a vehicle in the navigation mode. 1st special display mode ON / OFF key that highlights or stops links with level 1 and level 2 road traffic information around the position, and displays level 1 and level 2 road traffic information around the vehicle position on the entire screen A second special display mode on / off key for displaying or stopping the display is provided.

Reference numeral 101 denotes a navigation controller, which inputs each data of the vehicle position and the vehicle direction detected by the GPS receiver 4 in the navigation mode, and CD-R.
A map image around the vehicle position is drawn using the map data stored in the OM3, a vehicle position mark is superimposed on the map image, and the vehicle position is included in the VICS data received and demodulated by the FM multiplex broadcasting tuner 2. Using the data related to level 3 regarding the surrounding links, a graphic indicating a traffic jam location, a symbol indicating a caution / restriction location, etc. are overlaid and drawn on the map image and displayed on the display device 6. Level 1 of VICS data received and demodulated by the FM multiplex broadcast tuner 2 when the first special display mode is turned on
Or, the link around the vehicle position where the data of 2 exists is highlighted on the map image, and when the second special display mode is turned on, the screen is switched, and the level 1 character image at the top of the screen and the rest of all the levels are displayed. The simple map image of No. 2 is displayed in the normal size, and the voice synthesis output based on the level 1 character data is performed. In addition, when the navigation mode is switched to the road traffic information program mode, the road traffic information image related to the program selected by the program selection operation is displayed on the screen.

101e is map data stored in the buffer memory 10b when in the navigation mode,
From the VICS data stored in the buffer memory 10a and the vehicle position data, a link around the vehicle position (link within the range of the map image drawn in the video RAM) is specified, and the specified link is This is a search unit that searches for and outputs the VICS data of levels 1, 2, and 3 and outputs the coordinates of both end nodes of the link where the VICS data of levels 1 and 2 exist. The next mesh code and the reference link number are used to check which link in the map data the VICS data corresponds to. The search unit 101e
In the road traffic information program mode, searches for and outputs VICS data relating to a program desired by the user in accordance with the program selection operation.

Reference numeral 101f is a road traffic information guide section,
Level 3 searched by the search unit 101e when the first and second special display modes are off in the navigation mode
Based on the VICS data, the graphic indicating traffic jam and the symbol indicating caution / restriction are overlaid and drawn on the corresponding part of the map image of the video RAM 10c. In addition, when the first special display mode is turned on under the navigation mode, the node coordinates at both ends of the link where the VICS data of level 1 and 2 around the vehicle position exist are used to display a predetermined color on the map image of the video RAM 10c. Draw links highlighted by thick lines, broken lines, blinking, etc. When the second special display mode is turned on under the navigation mode, the VICS data relating to the levels 1 and 2 about the links around the vehicle position is used to replace the map image of the video RAM 10c with the level 1 above. A simple map image of level 2 is drawn in a normal size in the character image and the rest of the area. In the first special display mode, when there are a plurality of level 1 and level 2 VICS data around the vehicle position searched by the search unit 101e, the drawing is performed by switching at regular intervals. In the road traffic information program mode, the road traffic information image relating to the program desired by the user is drawn in the video RAM 10c.

Further, the road traffic information guide unit 101f has a built-in voice synthesizing circuit (not shown), and when the second special display mode is turned on, the level 1 VICS data retrieved by the retrieval unit 101e. Based on (character data)
It outputs the road traffic information voice signal that has been voice-synthesized.

15 to 18 are flow charts showing the operation of the navigation controller according to the third embodiment, and FIG. 19 is an explanatory diagram of an example of screen display, which will be described below with reference to these figures. When the power is turned on, the FM multiplex broadcasting tuner 2 tunes to the desired station, outputs the stereo audio signal received from the desired station, and the current receiving station is an FM multiplex broadcasting station compatible with the VICS system. Navigation controller 10 that also receives and demodulates VICS data
Output to 1. The navigation controller 101 temporarily stores the VICS data in the buffer memory 10a by interrupt processing. Further, when the power is turned on, the GPS receiver 4 periodically detects the vehicle position and the vehicle direction by satellite navigation, and outputs the vehicle position data and the vehicle direction data.

After the power is turned on, the navigation controller 101 enters the navigation mode (both the first special display mode and the second special display mode are off), and inputs the vehicle position data and the vehicle azimuth data from the GPS receiver 4 (see FIG. 15). Steps 901, 902). Then, the map drawing unit 10d reads the map data around the vehicle position from the CD-ROM 3 into the buffer memory 10b, and uses the read map data to display a north-facing map image for one screen centered on the vehicle position. Drawing is performed on the video RAM 10c (step 903). Next, the search unit 101e identifies a link around the vehicle position using the map data and the vehicle position stored in the buffer memory 10b (step 90).
4) Levels 1, 2 for the specified link in the VICS data stored in the buffer memory 10a
It is searched whether or not the data of each level of No. 3 exists, and when it exists, the road traffic information guide unit 10 for each level and for each link.
It is output to 1f (step 905). At this time, for links with VICS data of levels 1 and 2, node coordinates at both ends of the link are also output.

The road traffic information guide unit 101f is the search unit 1
When VICS data related to level 3 around the vehicle position is found in 01e, the video RAM 1 is searched based on the data.
A figure indicating a traffic congestion point, a mark indicating a caution / restriction point, etc. are drawn on the map image of 0c (step 906).
Next, the map drawing unit 10d, based on the vehicle direction data,
A vehicle position mark whose vehicle azimuth direction is oriented is drawn at the center of the map image in the video RAM 10e (steps 907 and 9).
08). The image drawn in the video RAM 10c is read by the conversion unit 10g, converted into a video signal of a predetermined system, output to the display device 6, and displayed on the screen (step 909, see FIG. 7 (1)). After this, the navigation controller 101 is operated by the operation panel 51.
It is checked whether or not the key operation has been performed (step 910, step 1001 in FIG. 16), and if there is no particular operation, again in FIG.
Returning to step 902 of 5, the next vehicle position data and vehicle azimuth data are input from the GPS receiver 4, and the same processing is repeated.

When the user wants to know the location of the link where the road traffic information of levels 1 and 2 exists, he presses the first special display mode ON key. Then, the navigation controller 101 enters the first special display mode (steps 910 and 911 in FIG. 15), and at this time, the road traffic information guide unit 101f causes the search unit 101e to previously perform level 1 and level 2 related to links around the vehicle position. VICS
When the data is searched, the video RAM is input using the node coordinates at both ends of the link where the level 1 and 2 VICS data around the vehicle position input from the search unit 101e exists.
On the map image of 10c, a link emphasized by a thick line of a predetermined color, a broken line, blinking, etc. is drawn (step 11 in FIG. 17).
01). Next, the map drawing unit 10d draws a vehicle position mark in which the vehicle azimuth direction is directed to the center of the map image of the video RAM 10e based on the vehicle azimuth data (step 110).
2). The image drawn in the video RAM 10c is the conversion unit 1
The signal is read by 0 g, converted into a video signal of a predetermined system, output to the display device 6, and displayed on the screen (step 1103, see FIG. 19). As a result, the location of the link where the level 1 and level 2 road traffic information exists can be known on the map image.

After that, when it is desired to know the contents of the level 1 and level 2 road traffic information, the second special display mode ON key is pressed. Then, the navigation controller 101 enters the second special display mode (step 1105 in FIG. 17, step 1201 in FIG. 18), and at this time, the road traffic information guide unit 101f causes the search unit 101e to perform a level related to links around the vehicle position in advance. Level 1 input from the search unit 101e when VICS data of 1 is searched
Based on the VICS data, the video RAM 1 is switched while switching at regular time intervals in the order of the link on which the vehicle position is located, the link in direct connection with the link, and the other links.
The road traffic information in text is drawn on the upper part of 0c, and in conjunction with this, a road traffic information voice signal is generated by voice synthesis and output to the amplifier 7 (steps 1202 and 1203). Further, when the search unit 101e is searching for level 2 VICS data related to links around the vehicle position, based on the level 2 VICS data input from the search unit 101e, the link on which the vehicle position is located, the link The simple map image is drawn in the normal size in the remaining area of the video RAM 10c while switching the links in the direct connection relationship and the other links in this order at regular intervals (step).
1204). The image drawn in the video RAM 10c is read by the conversion unit 10g, converted into a video signal of a predetermined system, output to the display device 6, and displayed on the screen (step 1205, see FIG. 7 (3)). Further, the road traffic information having the character content of level 1 flows from the speaker 8. As a result, it is possible to know traffic congestion information, caution / restriction information, etc. at Levels 1 and 2 around the vehicle position by using characters, a simple map, and voice synthesis output.

Thereafter, when the second special display mode off key is pressed, the mode returns to the first special display mode (steps 1206 and 1207 in FIG. 18, step 902 in FIG. 15), and the first special display mode off key is pressed. When the button is pressed, the display state of the map image in the original navigation mode is restored (step 1104 in FIG. 17, step 901 in FIG. 15). When the road traffic information program key is pressed, the navigation controller 101 enters the road traffic information program mode (see FIG. 16).
If the user performs a program selection operation on the operation panel 51, the search unit 101e causes the buffer memory 10
The relevant VICS data is retrieved from a and output to the road traffic information guide unit 101f, and the road traffic information guide unit 101f draws a road traffic information image relating to the user-desired program on the video RAM 10c based on the input VICS data. Yes (steps 1003 and 1004). Video RAM 10c
The image drawn on the screen is read out by the conversion unit 10g, converted into a video signal of a predetermined system, output to the display device 6 and displayed on the screen, so that the user can see the road traffic information image (step). 1005).

According to the third embodiment, when the first special display mode is turned on, whether or not there is level 1 or 2 road traffic information relating to links around the vehicle position at a glance just by looking at the map image. By turning on the second special display mode, it is possible to quickly obtain the level 1 or 2 road traffic information around the vehicle position.

When the second special display mode is entered,
The road traffic information images of levels 1 and 2 may be displayed on a part of the map image screen (see FIG. 7 (2)). Further, the level 1 road traffic information may be provided only by screen display or only by voice synthesis output. Also, in the first special display mode, only links having information of the type specified by the user in advance such as traffic jam, caution / regulation, travel time, etc. are searched, and the link on the map image is highlighted. When the 2 special display mode is turned on, only the type of information specified by the user may be provided. As a result, it is possible to know whether or not there is level 1 or 2 road traffic information around the vehicle position according to the information content such as traffic congestion, traffic restrictions, and the like.

[0055]

As described above, according to the present invention, the vehicle position is detected, the map image around the vehicle position is drawn together with the vehicle position mark using the map data, and the image is displayed on the screen. Various levels of VICS data relating to road traffic information are received from multiplex broadcasting, demodulated and temporarily stored. Then, referring to the map data and the temporary storage means, it is searched whether or not the VICS data of level 1 or 2 has been received for the links around the vehicle position.
Since the road traffic information based on the ICS data is configured to be displayed on a part of the screen of the display means or output by voice synthesis, it is possible to easily obtain the level 1 or 2 road traffic information about the links around the vehicle position. Therefore, it is possible to promptly take an appropriate response according to the road condition.

In addition, the level 3 VICS around the vehicle position
When the data has been received, the VICS data is used to draw a graphic / symbol indicating the road traffic information on the map image so as to be drawn. It is possible to obtain road traffic information of level 3 together with level 1 or level 2.

Further, the vehicle position is detected, a map image around the vehicle position is drawn together with the vehicle position mark using the map data, and is displayed on the screen. In parallel with this, from the FM multiplex broadcast to the road traffic information. The various levels of VICS data are received, demodulated, and temporarily stored. Then, referring to the map data and the temporary storage means, it is searched whether or not the level 1 or 2 VICS data has been received for the links around the vehicle position, and when the level 1 or 2 VICS data has been received, according to the user's request, based on the VICS data. Since the road traffic information is configured to be switched and displayed on the screen of the display means, it is possible to easily obtain the level 1 or 2 road traffic information about the links around the vehicle position, and to respond appropriately according to the road conditions. Can be taken promptly. At this time, it is also searched whether level 3 VICS data around the vehicle position has been received, and when level 3 VICS data is found while the map image is displayed on the screen, the VICS data is used. By drawing the figures / symbols indicating the road traffic information on the map image, the road traffic information of level 1 or 2 around the vehicle position and level 3 can be easily obtained.

Further, referring to the map data and the temporary storage means, it is searched whether VICS data is received for the link currently on the vehicle or a link on the extension of the link, and the corresponding VICS data is found. When it is issued, the road traffic information including the positional relationship with the vehicle position is displayed on a part of the screen of the display means or voice-synthesized and output based on the VICS data. It is possible to quickly know traffic jams, traffic restrictions, etc. existing in, and it is possible to promptly take an appropriate response according to road conditions.

Further, referring to the map data and the temporary storage means, it is searched for the VICS data of level 1 or 2 for the link included in the map image on the screen, and the corresponding VICS data is found. At this time, the corresponding link on the map image on the screen is highlighted, and when the user requests road traffic information, the road traffic information based on the VICS data found by the search means is displayed on the screen of the display means, or Since the speech synthesis output is provided, it is possible to determine at a glance whether or not the level 1 and level 2 road traffic information related to the link around the vehicle position exists, and the level 1 or level 2 road traffic information around the vehicle position can be quickly released. Can be obtained.

Further, it is searched whether or not the level-1 or level-2 VICS data for each information content designated by the user exists, and when the corresponding VICS data is found, the corresponding link on the map on the screen is highlighted. With such a configuration, it is possible to know whether or not there is level 1 or 2 road traffic information around the vehicle position according to information content such as traffic congestion, traffic regulation, and the like.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a vehicle-mounted navigation device according to a first embodiment of the present invention.

FIG. 2 is a first flowchart showing the operation of the navigation controller in the first embodiment.

FIG. 3 is a second flowchart showing the operation of the navigation controller in the first embodiment.

FIG. 4 is a third flowchart showing the operation of the navigation controller in the first embodiment.

FIG. 5 is a fourth flowchart showing the operation of the navigation controller in the first embodiment.

FIG. 6 is a fifth flowchart showing the operation of the navigation controller in the first embodiment.

FIG. 7 is an explanatory diagram showing a screen display example of the first embodiment.

FIG. 8 is an overall configuration diagram of a vehicle-mounted navigation device according to a second embodiment of the present invention.

FIG. 9 is an operation explanatory diagram of the road traffic information guide unit according to the second embodiment.

FIG. 10 is a first flowchart showing the operation of the navigation controller in the second embodiment.

FIG. 11 is a second flowchart showing the operation of the navigation controller in the second embodiment.

FIG. 12 is a third flowchart showing the operation of the navigation controller in the second embodiment.

FIG. 13 is an explanatory diagram showing a screen display example of the second embodiment.

FIG. 14 is an overall configuration diagram of a vehicle-mounted navigation device according to a third embodiment of the present invention.

FIG. 15 is a first flowchart showing the operation of the navigation controller in the third embodiment.

FIG. 16 is a second flowchart showing the operation of the navigation controller in the third embodiment.

FIG. 17 is a third flowchart showing the operation of the navigation controller in the third embodiment.

FIG. 18 is a fourth flowchart showing the operation of the navigation controller in the third embodiment.

FIG. 19 is an explanatory diagram showing a screen display example of the third embodiment.

[Explanation of symbols]

 2 FM multiple broadcast tuner 3 CD-ROM 4 GPS receiver 5, 50, 51 Operation panel 6 Display device 7 Amplifier 8 Speakers 10, 100, 101 Navigation controller 10a Buffer memory 10c Video RAM 10d Map drawing unit 10e, 100e, 101e Search section 10f, 100f, 101f Road traffic information guide section

Claims (7)

[Claims] 1. FM multiplex broadcast receiving means for receiving and demodulating various levels of VICS data relating to road traffic information from FM multiplex broadcast, temporary storage means for temporarily storing VICS data, and map data storage for storing map data. Means, a vehicle position detecting means for detecting the vehicle position, a map drawing means for displaying a map image around the vehicle position together with the vehicle position mark on the screen of the display means, the map data and the temporary storage means, and the vehicle position Retrieval means for retrieving whether level 1 or 2 VICS data is received for the surrounding links, and when the retrieval means finds level 1 or 2 VICS data, displays road traffic information based on the VICS data. Road traffic information guide means for displaying on a part of the screen of the means or for voice synthesis output, Vehicle navigation apparatus that. 2. The searching means also searches level 3 VICS data around a vehicle position, and when the level 3 VICS data is found by the searching means, the road traffic information guide means causes the VICS data to be searched. The vehicle-mounted navigation device according to claim 1, wherein the map image is used to draw a figure / symbol indicating road traffic information so as to be overlaid on the map image. 3. FM multiplex broadcast receiving means for receiving and demodulating various levels of VICS data relating to road traffic information from FM multiplex broadcasting, temporary storage means for temporarily storing VICS data, and map data storage for storing map data. Means, a vehicle position detecting means for detecting the vehicle position, a map drawing means for displaying a map image around the vehicle position together with the vehicle position mark on the screen of the display means, the map data and the temporary storage means, and the vehicle position Retrieval means for retrieving whether the level 1 or 2 VICS data is received for the peripheral links, and when the level 1 or 2 VICS data is found by the retrieval means, according to the request, road traffic based on the VICS data. A vehicle-mounted device characterized by comprising road traffic information guide means for switching and displaying information on the screen of the display means. Navigation equipment. 4. The searching means also searches the level 3 VICS data around the vehicle position, and when the level 3 VICS data is found by the searching means while the map image is displayed on the screen. 4. The vehicle-mounted navigation device according to claim 3, wherein the road traffic information guide means draws a graphic / symbol indicating road traffic information on a map image by using the VICS data in an overlapping manner. . 5. V related to road traffic information from FM multiplex broadcasting
FM multiplex broadcast receiving means for receiving and demodulating ICS data, temporary storage means for temporarily storing VICS data, map data storage means for storing map data, vehicle position detecting means for detecting vehicle position, and vehicle position periphery A map image of the vehicle is drawn together with the vehicle position mark and displayed on the screen of the display means, and by referring to the map data and the temporary storage means, the link currently on the vehicle or a link which is an extension of the link. Therefore, when the VICS data is found by the searching means, the searching means for searching whether the VICS data is received or not
A vehicle-mounted navigation, comprising: road traffic information guide means for displaying road traffic information including a positional relationship with a vehicle position based on CS data on a part of a screen of the display means or for voice synthesis output. apparatus. 6. FM multiplex broadcast receiving means for receiving and demodulating various levels of VICS data relating to road traffic information from FM multiplex broadcast, temporary storage means for temporarily storing VICS data, and map data storage for storing map data. Refer to the means, the vehicle position detection means for detecting the vehicle position, the map drawing means for drawing the map image around the vehicle position together with the vehicle position mark and displaying it on the screen of the display means, the map data and the temporary storage means. , VIC of level 1 or 2 for the links included in the map image on the screen
A link for highlighting the corresponding link on the map image on the screen when the VICS data is found by the search means in the state where the map image is displayed on the screen and the search means for searching for the presence of S data. A road traffic information guide for displaying on the screen of the display means or synthesizing voice by giving priority to the road traffic information based on the VICS data found by the search means when the user requests road traffic information. 7. The vehicle-mounted navigation device according to claim 6, further comprising: 7. The vehicle-mounted navigation device according to claim 6, wherein the retrieval means retrieves VICS data for each information content designated by the user.